1323313740 has 384 divisors, whose sum is σ = 5078384640. Its totient is φ = 279417600.

The previous prime is 1323313721. The next prime is 1323313741. The reversal of 1323313740 is 473133231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1323313741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2694895 + ... + 2695385.

It is an arithmetic number, because the mean of its divisors is an integer number (13224960).

Almost surely, 2^1323313740 is an apocalyptic number.

1323313740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323313740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2539192320).

1323313740 is an abundant number, since it is smaller than the sum of its proper divisors (3755070900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323313740 is a wasteful number, since it uses less digits than its factorization.

1323313740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 1323313740 is about 36377.3795097998. The cubic root of 1323313740 is about 1097.8784839693.

Adding to 1323313740 its reverse (473133231), we get a palindrome (1796446971).

The spelling of 1323313740 in words is "one billion, three hundred twenty-three million, three hundred thirteen thousand, seven hundred forty".